Welcome to the Community, @sharon40.
At this time, there's not a way to customize the layout of your Customer List or Profile. I'm going to submit feedback to our Product Development Team about bringing in a feature that will allow you to change how the Customer information is shown in your books. You can visit our Blog to see what's new and upcoming features to QuickBooks Online.
Let me know if you have additional questions or concerns. I'm happy to help.
